Abstract
With the expansion of cucumber cultivation, many growers continue to experience extreme weather and environmental issues. This study aimed to examine and model the effects of low temperature (LT) and poor light (PL) stresses on cucumber growth. The experiment was designed as an orthogonal experiment that analyzed temperature, light, and duration. The daily maximum/minimum temperatures of the experiment were set as per the following four levels: 13 °C/3 °C, 16 °C/6 °C, 19 °C/9 °C, 22 °C/12 °C, and the control at 28 °C/18 °C. The light was divided into two levels: 200 μmol∙m−2∙s−1 and 400 μmol∙m−2∙s−1, with 800 μmol∙m−2∙s−1 as the control. Treatment duration was set at 2, 5, 8, and 11 days. Stress with different LT, PL, and duration was expressed using the stress effect (0–1), which decreased with an increase in stress level. Meanwhile, treatment with a temperature of 3 °C and light of 400 μmol∙m−2∙s−1 for 11 days had the smallest effect on stress, which was only 67% of that of the control following 50 days of recovery, and had the most severe effect on cucumber growth. The proportion of dry weight allocated to leaves and stems decreased with increasing low temperatures and poor light stress, but the proportion allocated to fruit increased. The highest percentage of fruit distribution was found in the treatment with temperature of 9 °C, light of 200μmol∙m−2∙s−1, and 11 days duration, being 3.57 times higher than the control. In order to better investigate the effects of LT and PL stress on cucumber growth, light and temperature effect (LTE), growing degree days (GDD), and product of thermal effectiveness and PAR (TEP) models were developed based on temperature and light. The root mean square error (RMSE) of the LTE model was found to be 4.214 g∙plant−1, 36.3% of that of the GDD model and 78.8% of that of the TEP model, better simulating the above-ground dry weight of cucumber plants.
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Claims 6
Claim · model-written summary
Stress effect decreased as stress level increased.
- Taxon
- Cucumbers
Cucumis sativust0 - Treatment
- LT, PL, and duratione0
- Outcome
- stress effecte0
- Direction
- decreasede0
- Value
- 0–1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stress with different LT, PL, and duration was expressed using the stress effect (0–1), which decreased with an increase in stress level.”
t0“Cucumbers”
Claim · model-written summary
The 3 °C, 400 μmol∙m−2∙s−1, 11-day treatment caused the most severe cucumber growth effect, 67% of control after recovery.
- Taxon
- cucumberCucumis sativuse0
- Treatment
- temperature of 3 °C and light of 400 μmol∙m−2∙s−1 for 11 dayse0
- Outcome
- cucumber growthe0
- Direction
- most severee0
- Value
- 67%e0
- Qualifier
- following 50 days of recoverye0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with a temperature of 3 °C and light of 400 μmol∙m−2∙s−1 for 11 days had the smallest effect on stress, which was only 67% of that of the control following 50 days of recovery, and had the most severe effect on cucumber growth.”
Claim · model-written summary
Leaf and stem dry weight allocation decreased as low temperature and poor light stress increased.
- Taxon
- CucumbersCucumis sativust0
- Treatment
- low temperatures and poor light stresse0
- Outcome
- proportion of dry weight allocated to leaves and stemse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The proportion of dry weight allocated to leaves and stems decreased with increasing low temperatures and poor light stress”
t0“Cucumbers”
Claim · model-written summary
Fruit dry weight allocation increased as low temperature and poor light stress increased.
- Taxon
- CucumbersCucumis sativust0
- Treatment
- low temperatures and poor light stresse1
- Outcome
- proportion allocated to fruite0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the proportion allocated to fruit increased.”
e1“increasing low temperatures and poor light stress”
t0“Cucumbers”
Claim · model-written summary
Fruit dry weight allocation peaked at 9 °C, 200μmol∙m−2∙s−1 and 11 days, 3.57 times the control.
- Treatment
- temperature of 9 °C, light of 200μmol∙m−2∙s−1, and 11 days duratione0
- Outcome
- percentage of fruit distributione0
- Direction
- higheste0
- Value
- 3.57 timese0
- Comparator
- controle0
Not reportedTaxon
Verbatim
e0“The highest percentage of fruit distribution was found in the treatment with temperature of 9 °C, light of 200μmol∙m−2∙s−1, and 11 days duration, being 3.57 times higher than the control.”
Claim · model-written summary
The LTE model simulated above-ground cucumber dry weight with RMSE 4.214 g∙plant−1, 36.3% of GDD and 78.8% of TEP RMSE.
- Taxon
- cucumberCucumis sativuse0
- Outcome
- root mean square error (RMSE)e0
- Direction
- bettere0
- Value
- 4.214 g∙plant−1e0
- Qualifier
- 36.3% of that of the GDD model and 78.8% of that of the TEP modele0
- Comparator
- GDD modele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root mean square error (RMSE) of the LTE model was found to be 4.214 g∙plant−1, 36.3% of that of the GDD model and 78.8% of that of the TEP model, better simulating the above-ground dry weight of cucumber plants.”
The same questions in other papers
light · growth · Cucumis sativus (cucumber)Results differ
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